Interested to Buy Any Domain ? << Click Here >> for more details...
how to calculate size of cable from motor current given and
how to calculate full load current of a induction motor.
- 3 Answers
- 5822 Views
- Aarti Steels, I also Faced
- E-Mail Answers
Answer Posted / raviteja vaka
First the simple one: IM Full Load Current
I=W/root(3)*V(L-L)*PF*Efficiency of Motor
PF and Efficiency will be available from name plate data of
IM. In general u can consider PF=0.8 and Efficiency=0.85
Ex: FLC of 37 KW motor having 415V, 0.8 pf and efficiency as
0.85
I= 37000/Root(3)*1.732*0.8*0.85
I=75A
For calculating the cable size they are many factors to be
considered
* Load Current
* Voltage Level
* Length
* Voltage Drop
* Temperature Factor
* Grouping Factor
| Is This Answer Correct ? | 5 Yes | 2 No |
Post New Answer View All Answers
What is stepper motor. What is its uses?
What is the distance between each insulator in 33kv transformer and how can it calculate
132/66kv sub-station procation ?
What are m circles?
How to select cable the size, what is the parameters use and what is the formulas use for this cable size calculation?
what is the reason the main breaker is trip during the motor is running? (some time the breaker is not trip)
what is meant by moulded case circuit breaker ?
We have drive feeding an output contactor for a 5000 hp motor @ 5kV application. The motor FLA is 629amps x 1.25% service factor = 786.25 amps The cable that we current have in place between the drive and the output contactor is 350kcmil- MV-105 (parallel cables). Per the NEC table 310.60 (C) (69). This show the cable ampacity is at 615 amps per cable for a rating of 1230 amps. We have derated the cable for the cable tray and the multiple cables application and our calculations show that after the correction factor factor we are at 922amps. 1230 amps x .75% correction factor factor = 922.5 amps. The customer is driving us to then use another safety factor of .25% off of the already derated cable. Can you please provide a longhand calculation for your solution on this application?
explain the mode of metal iranafer in Co,welding
is the value of inductance depends upon the evalue of thitha in doubly excited machine?
can u please mail me the syllabus for GET exam for damodar valley corporation?
How it can worked plc based electrical system And which type of software using.
What is the difference between solid grounding and impedance grounding?
What is “pu” in electrical engineering?
what is the reactance,capacitance & impedence electrical armoured & unarmored Cables.
